PreviewType

type PreviewType = (

  UndefinedPreview = 0,

  RotatePreview,

  ShearPreview,

  RollPreview,

  HuePreview,

  SaturationPreview,

  BrightnessPreview,

  GammaPreview,

  SpiffPreview,

  DullPreview,

  GrayscalePreview,

  QuantizePreview,

  DespecklePreview,

  ReduceNoisePreview,

  AddNoisePreview,

  SharpenPreview,

  BlurPreview,

  ThresholdPreview,

  EdgeDetectPreview,

  SpreadPreview,

  SolarizePreview,

  ShadePreview,

  RaisePreview,

  SegmentPreview,

  SwirlPreview,

  ImplodePreview,

  WavePreview,

  OilPaintPreview,

  CharcoalDrawingPreview,

  JPEGPreview

);